Look at this borad: http://online.bridgebase.com/myhands/hands...030520-20337941 On my table (and others), the bidding is like this: http://tinyurl.com/25fyn6w 3♦ by East is very strange. The explanation says: "New suit, bad S, .... twice rebiddable C;....." Then, West bid 4♣ with Q2. It's terrible. However, on some tables (like this one http://tinyurl.com/263f86c), the 3♦ bid by East is said: "4+D.....", and West pass. I think this one is more correct. I played this hand on web version, and many tables encounter the same bug. However some GIB on other tables are OK. Therefore, I guess maybe this bug happens only on web version. Thank you for your attention. May you correct this. Sincerely yours.